Underwater motive device



FIG. 1 is a perspective view of the underwater motive device, the screen shown in dashed line format to show environment and forming no part of the design;

FIG. 2 is a right side view, the left side view being a mirror image of the right side view;

FIG. 3 is a top view;

FIG. 4 is a bottom view;

FIG. 5 is a front end view; and,

FIG. 6 is a rear end view. 

The ornamental design for an underwater motive device, as shown and described. 